Electrode for secondary batteries



1&(3108841 'in British "UNITE-n STATES PAT T OFFICE.

FARNHAM MAXWELL LYTE, or ounon, .ooUn'rY or ninnnnsnn'nuemnn, ASSIGNOR TO T E ELECTRIC, one COMPANY onAM'nmoA, orrrnmnnn PHIA, rENNsYLvAmm snsc'raoo s roe SECONDARY BATTER-[ESQ mementos-manhunt or Liam music He. 422,308,6hted Felim as, ieeo';

0:1 am s, filed to batteries; and it consists of certain improveinents', whichare fullygset forth in the 01 lowing specifioationandfishown inithe accom-' panying drawingsmhicli form a' part thereof.

1 1 This application is for an invention dies Letters Patent No.3,4512, gianted tome on, July l3, 1883, and is a dis,

' yision of my application,-Serial No. 295,677,

' i filed January 7, 18,89. W

IThis invention .relates to secondary bat-' :o t'eries or accumulatcirs, and it consists in the peculiar constrnctioh "of the electrodes, as hereinafter described.'- According to my invention 1 constructa battery in which the active material of the electrode isfornied by compressing intoa' mold .or otherwise- -either chloride let any equivalent salt of leade-such as the nitrate-'- mixed or not with oxid'c oflead, orby fusing chloride of lead or equivalent salt-of lead, 30' mixed or not with/oxide of lead, and running the same into a mold of the proper shape,

and thenremoving the mass from the mold. and reduc'ing it bycontact with metallic zinc in salt and water, or by electrolysis, to the state of coherent spongylead. If-desired, the fused leadchloride or other salts of lead soluble in waterand' insoluble :in' sulphnrier acid, mixed or not. with lead oxide, and whether or not they have been agglomerated- 49 in a mold' without being freed and mixed with lead oxide, may be secured in or toor form the supporting-plates before being isduced, and berednced therein or thereon. to" a state of spongy 1ead. If desired,'l may use 'any other equivalentform of finely-divided lead, and I may form the electrode-b; com-1' pressing the active material into the esired form with or .withoutfithe employment ofa '7,-1889,BerlI-1Ho- 295,677- nmm and an s utum 826,072; Gomodel'.) Patentndinllnglmdil'fly 13,1883,Foi3, 452-.

' Having noxwleseribed-'my-mvention,=wlratmeme to 25, mo. semina grid or metal frame} Itmill thus be seen that: inmaking theacthiematerial ior my electrode I-employa-salt of lead which is in soluble in the electrolytic fluid,i sulphuric aciddiluted,)andyetsoltrbleinwatertpamore or less degree, andminitwith the oxide of lead, or, if desired, any finelyzdivided form of me; 5 5 tallic lead. The miiture is made into apaste and then compressed-into the desired form, and when dry maybe immersed in 'the electrolytic fluid and formed!- The active ma 'terial I so molded mja ywbel used by having a series of such molded pieces held or-bound together by castin g a lead frame" around them, asset out'in ny application of which this is a division. :There are in addition to the chloride quite;; az,number' of salts orcompounds of ead which are, insoluble in sul- 1 phuric acid, (such,-;tor"instanc, as nitrate of lead or sodium pldljiibategwhich a'rechemical equivalents ofthechldride oflead in this. connection,) and all of which are soluble in 30 water. 'The mixture of these salts .with the lead oxide and water'enables the plastic-active material thus produced to be molded or shaped as desired, and then dried for the purpose of crystalliaing the said salts in intimate contact with the oxide of leader metalliolead which it holds ina firm condition; and enables rapid forming without dismte gration when the electrode is. placedjn sol phuric acid and a strong electric current'sent through it. j v

I do not confine myself-to the more details, as they may be varied without departing from the spirit of the invention.

I claim as new, and desire toecure by Letters Patent,is'-; '1; An element or electrode fora secondary battery, consisting of alnixture of active ma terial witha salt of lead which is-soluble in water and insoluble in sulphuric acid; 2..Materialto become active for use .'-in .a; secondary battery, consistingof'lead'oxide the chloride.

3. As-a'newarticle-oi mannfaoture,e sec;

with any soluble salt 05: compound of lead, as

qndery-battery electrode cbnsiathig e! an in- -lnfieetimonye f fivhieh ievention IIIIGKQHIINZO re tmlate mixture of an exide'of lead and. .a ,set my hand.

salt of lead soluble in water and insoluble in v v sulphuric acid. FARNHAM MAXWELL 'LYTE. 5 4-. As anew article of manufacture, a secondary-battery electrode cgnsisting-of an Witnesaes-: 4

xide,salt,-or com. und-of leagi .withaealfl BERKLEYIURRIS,

Wllieh when unif forms a salt of lead in- Notary Public, j

- aoluble in acid but soluble in water. Bmn mcm MAXWELL LY'm'. 

